function wrsqz_assemble($text, $vars=array()){
global $CFG;
if(!isset($text[0])) return $text;
$W = WIRISQUIZZESEXTENSION;//This char should be always 'W'
$T = 'T';
$M = 'M';
mb_internal_encoding("UTF-8");
mb_regex_encoding("UTF-8");
//Transform #x into ##Wx
$start=0;
while(($char = strpos($text,'#',$start))!==false){
if(($char == 0 || substr($text,$char-1,1)!='#') && $char+1<strlen($text)){
$char1 = substr($text, $char+1,1);
if(('a'<=$char1 && $char1<='z') || ('A'<=$char1 && $char1<='Z')){
$text = substr($text,0,$char) . '##W' . substr($text,$char+1);
$start = $char + 3;
}else{
$start = $char+1;
}
}else{
$start = $char + 1;
}
}
//Transform ##Wx into ##Wx## in order to avoid conflicts between 2 variables
//such that the name of the first is a prefix of the name of the second
$text = mb_ereg_replace('##(['.$W.$M.$T.']'.WRSQZ_ONLYLETTERS . WRSQZ_ONLYLETTERSANDNUMBERS . '*)', '##\1##', $text);
//classify vars depending on their nature (##M, ##W and ##T)
$mathmlvars = array();
$encodedvars = array();
$textvars = array();
$imagevars = array();
foreach ($vars as $name=>$value){
if(!empty($name)){
$prefix = substr($name,0,3);
$name = $name . '##';
if($prefix=='##'.$M){
$mathmlvars[$name]=$value;
}else if($prefix == '##'.$W){
if (mb_substr($value,0,7)==='<image>') {
$imagevars[$name] = wrsqz_imgHTMLTag($value);
}else{
$encodedvars[$name]=wrsqz_mathmlEncode($value);
}
}else if($prefix == '##'.$T){
$textvars[$name]=$value;
}
}
}
//find MathML formulas & replace ##Mx variables inside.
//We are using not-multibyte functions very carefully due to performance reasons.
$start=0;
while (($start = strpos($text,'<math',$start))!==false){
$length = strpos($text, '</math>',$start) - $start + strlen('</math>');
$formula = substr($text, $start, $length);
$formula = wrsqz_assembleInsideFormula($formula, $mathmlvars, false);
$text = substr($text,0,$start) . $formula . substr($text, $start+$length);
$start = $start+strlen($formula);
}
//find encoded MathML formulas & replace ##Wx variables inside them.
//We are not using multibyte functions.
$start=0;
while (($start = strpos($text,'«math',$start))!==false){
$length = strpos($text, '«/math»',$start) - $start + strlen('«/math»');
$formula = substr($text, $start, $length);
$formula = wrsqz_assembleInsideFormula($formula, $encodedvars, true);
$formula = wrsqz_extractTextFromMathML($formula);
$text = substr($text,0,$start) . $formula . substr($text, $start+$length);
$start = $start+strlen($formula);
}
//Replace variables outside formulas
//MathML ones
foreach($mathmlvars as $name=>$value){
$text = str_replace($name, '<math xmlns="http://www.w3.org/1998/Math/MathML">' . $value . '</math>', $text);
}
//Encoded MathML Ones
foreach ($encodedvars as $name=>$value){
$value = wrsqz_extractTextFromMathML('«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»'.$value.'«/math»');
$value = wrsqz_extractNumbersfromMathML($value);
$text = str_replace($name, $value, $text);
}
//Text Ones
foreach ($textvars as $name=>$value){
$text=str_replace($name, $value, $text);
}
//Image Ones
foreach ($imagevars as $name=>$value){
$text = str_replace($name, $value, $text);
}
return $text;
}
'<math><mrow><msqrt><mrow><mn>2</mn><msqrt><mn>3</mn></msqrt></mrow></msqrt><mi>#a</mi></mrow></math>',
'<math><mrow><msub><mi>#</mi><mi>a</mi></msub></mrow></math>' => '<math><mrow><msub><mi>#</mi><mi>a</mi></msub></mrow></math>',
'<math><mrow><mi>#</mi><msub><mi>a</mi><mi>c</mi></msub></mrow></math>'=>'<math><mrow><msub><mi>#a</mi><mi>c</mi></msub></mrow></math>',
);
foreach($tests as $test=>$correct){
$resp = wrsqz_prepareVariablesInsideFormulas($test, FALSE);
echo '<tr><td>';
echo $resp == $correct ? 'OK' : 'KO';
echo '</td>';
echo '<td>'.htmlentities($test, ENT_COMPAT, 'UTF-8').'</td>';
echo '<td>'.htmlentities($resp, ENT_COMPAT, 'UTF-8').'</td>';
echo '</tr>';
}
foreach($tests as $test=>$correct){
$correct = wrsqz_mathmlEncode($correct);
$test = wrsqz_mathmlEncode($test);
$resp = wrsqz_prepareVariablesInsideFormulas($test, TRUE);
echo '<tr><td>';
echo $resp == $correct ? 'OK' : 'KO';
echo '</td>';
echo '<td>'.htmlentities($test, ENT_COMPAT, 'UTF-8').'</td>';
echo '<td>'.htmlentities($resp, ENT_COMPAT, 'UTF-8').'</td>';
echo '</tr>';
}
?>
</tr>
</table>
</body>
</html>
function wrsqz_response_summary($questionType, $dbType, $question, $state, $length=80){
if($questionType == 'match'){
//assemble Questiontexts and answers.
$subquestions = &$state->options->subquestions;
$responses = &$state->responses;
$table = new stdClass();
$table->data = array();
$table->width = '100%';
foreach ($subquestions as $key => $sub) {
foreach ($responses as $ind => $code) {
if (isset($sub->options->answers[$code])) {
//assemble $text in encoded MathML.
$text = format_text(wrsqz_assemble($subquestions[$ind]->questiontext,$state->vars),$question->questiontextformat);
//assemble $answer in text mode.
$answer = wrsqz_assemble(wrsqz_variablesToText($sub->options->answers[$code]->answer),$state->vars);
$table->data[] = array($text ,$answer);
}
}
}
$summary = print_table($table, true);
}else if($questionType == 'shortanswer'){
if(isset($state->responses[''])){
mb_parse_str($question->options->wiris->eqoption, $eqoptionArray);
if(isset($eqoptionArray['editor']) && $eqoptionArray['editor'] == 'true'){
$summary = format_text(wrsqz_mathmlEncode(stripslashes($state->responses[''])),FORMAT_HTML);
}else{
$summary = stripslashes($state->responses['']);
}
}else{
$summary='';
}
}else if($questionType == 'truefalse'){
if(isset($state->responses['']) && isset($question->options->answers[$state->responses['']])){
$summary = $question->options->answers[$state->responses['']]->answer;
}else{
$summary = '';
}
}else if($questionType == 'multianswer'){
global $QTYPES;
$table = new stdClass();
$table->data = array();
$table->data[0] = array();
$table->width = '100%';
$numquestions = count($question->options->questions);
$table->size=array_fill(0,$numquestions,100/$numquestions . '%');
foreach ($question->options->questions as $key=>$wrapped) {
$wrappedstate = clone($state);
$wrappedstate->responses = array(''=>$state->responses[$key]);
$table->data[0][] = $QTYPES[$wrapped->qtype]->response_summary($wrapped,$wrappedstate);
}
$summary = print_table($table, true);
}
return $summary;
}